EP0699800A2
Expired / Lapsed
EP
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Hot melt coatings for paper and paperboard
Assignee: National Starch and Chemical Investment Holding Corp
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Filing: 1995-06-06
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Granted: —
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Expires: 2015-06-06
Abstract
Abstract A process for coating paper comprising applying to the paper a molten 100% solids paper coating composition, the composition comprising 20 to 98% by weight of a polylactide homo- or copolymer containing at least 20 molar percent of the lactide component; 2 to 80% by weight of a polar tackifier having a Ring and Ball softening point (as described by ASTM E-26) greater than about 60°C; 0 to 50% by weight of a plasticizer; 0 to 30% by weight of a wax diluent and 0 to 3% by weight of a stabilizer.
Inventors
- 👤 Thomas F. Kauffman
- 👤 Stephen F. Hatfield
- 👤 Matthew L. Sharak
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 15:32
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/10; D21H19/14; D21H19/24; D21H19/28; C; C09; C09D; C09D167/00; C09D167/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
114 words
A coated paper product selected from the group consisting of tampon applicators, vaginal medicinal applicators, paper plates, paper trays and multi-wall paper bags, the exterior portion thereof having been coated with a molten 100% solids paper coating composition, the coating composition comprising 20 to 98% by weight of a polylactide homo- or copolymer containing at least 20 molar percent of the lactide component; 2 to 80% by weight of a polar tackifier having a Ring and Ball softening point (as described by ASTM E-26) greater than about 60°C; 0 to 50% by weight of a plasticizer; 0 to 30% by weight of a wax diluent and 0 to 3% by weight of a stabilizer.
Claim 2
Dependent Claim
18 words
The coated paper product of Claim 1 wherein the polylactide polymer in the paper coating is poly(d,l-lactide) homopolymer.
Claim 3
Dependent Claim
54 words
The coated paper product of Claim 1 wherein the hot applied paper coating composition comprises 20 to 70% by weight of a polylactide homo- or copolymer containing at least 20 molar percent of the lactide component, 10 to 60% of a tackifying resin, 0 to 3% of a stabilizer and 10 to 50% plasticizer.
Claim 4
Dependent Claim
29 words
The coated paper product of Claim 1 wherein the polylactide in the hot applied paper coating has a number average molecular weight within the range of 10,000 to 20,000.
Claim 5
Dependent Claim
56 words
The coated paper product of Claim 1 wherein the tackifying resin in the hot applied paper coating is selected from the group consiting of (1) natural and modified rosins; (2) glycerol and pentaerythritol esters of natural and modified rosins; (3) phenolic modified terpene resins and hydrogenated derivatives thereof; (4) thermoplastic alkyl phenolic resins; and mixtures thereof.
Claim 6
Dependent Claim
49 words
The coated paper product of Claim 1 wherein the plasticizer in the hot applied paper coating is selected from the group consisting of phthalate plasticizers; liquid polyesters; benzoate plasticizers; phosphate plasticizers; poly(ethylene glycols) and derivatives thereof; and liquid rosin derivatives having Ring and Ball melting points below about 60°C.
Claim 7
Dependent Claim
47 words
The coated paper product of Claim 1 wherein the wax in the hot applied paper coating is selected from the group consisting of hydroxy stearamide wax, hydrogenated castor oil, oxidized synthetic waxes, poly(ethylene oxide) having a weight average including weight above about 1000 and functionalized synthetic waxes.
References Cited (Backward Citations)
US4073776A
Cited
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